Offenhauser 39-53 Flathead Ford 4-Ring Pistons, 4.00 Stroke/3.248 Bore
Offenhauser 39-53 Flathead Ford 4-Ring Pistons, 4.00 Stroke/3.248 Bore
Offenhauser

|

#56042604

Offenhauser 39-53 Flathead Ford 4-Ring Pistons, 4.00 Stroke/3.248 Bore

  • Utilizes the original 4-ring design but incorporates modern manufacturing
  • .060" oversize
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Bore/Stroke:

3.248" Bore / 4.00" Stroke

3.248" Bore / 3.75" Stroke3.313" Bore / 3.75" Stroke

$269.99

/set

In Stock

Order soon, only 1 left in stock!

Garage Sale alternatives: from $243.99


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Product Summary

Flat Top Piston Style, Cast Aluminum Piston Material

  • Utilizes the original 4-ring design but incorporates modern manufacturing
  • .060" oversize
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Key Specs

MFG. Part #56042604
BrandOffenhauser
Piston StyleFlat Top
Piston MaterialCast Aluminum
Wrist Pin IncludedYes
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Offenhauser 56042604 Details

Original Flathead pistons used four rings, were somewhat round, had questionable wrist pins and locks and were made of cast iron. These pressure-cast aluminum pistons share the four-ring design, but are cam ground and use modern steel wrist pins and real snap rings. They’re a great upgrade when rebuilding your 1939-1953 flathead Ford or Mercury V8 engine.

  • Original 4-ring design
  • Pressure cast aluminum construction provides great strength and durability
  • Precision cam ground
  • Modern steel wrist pins
  • Snap ring style retainer clips

The original bore size was 3.188", which makes these .060" oversize. Sold in sets of eight.

Item Details

3.248" bore, 4.00" stroke

Offenhauser 56042604 Specifications

KEY SPECS
MFG. Part #56042604
BrandOffenhauser
Piston StyleFlat Top
Piston MaterialCast Aluminum
Wrist Pin IncludedYes
GENERAL
Piston Diameter3.248"
Stroke4.000"
Sold in QuantitySet

Ratings & Reviews

5

5 Reviews

Overall Assessment

Customers were pleased with the product's impeccable quality as a robust and perfect replacement. The item was especially noted for its perfect fit for .060" over with 4" stroke crankshaft. Using on various vintage cars like a 1950 Mercury flathead and a 1934 5/W, customers commended its great fit and optimal tolerance. These details illustrate that its usability across different scenarios and superior material quality ensure its practical application for future usage by customers again, setting it above many competitors.

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I would buy again

5.0

7 months ago

DAC

Roswell

Verified

Pistons were great

Would Recommend

very nice product

5.0

4 years ago

Roger D

Lancaster PA

It is just a nice replacement

Would Recommend

Perfect fit for .060" over with 4" stroke crankshaft.

5.0

4 years ago

Prescott

Edmonton, AB, Canada

Verified

Used on 1950 Mercury flathead bored .060" over with 4" stroke crankshaft.

Would Recommend

I would buy this product again.

5.0

4 years ago

None

Hokes Bluff, Al

Verified

Going in a 1934 5/W that was first hottrodded in the late 1950's.

Would Recommend

Yes I would .

5.0

6 years ago

Pickup.

LH C . A Z.

Verified

They fit great and tolerance was perfect .

Would Recommend

Showing 5 of 5 reviews

Questions & Answers

3 Questions • 3 Answers

What is the compression height of this piston?

by Mark

• 3 years ago

1 answer

View Answer

Is this a dome piston or a flat top piston? looks like dome,but says flat top!

by cary

• 8 years ago

1 answer

View Answer

What is the diameter of the piston axle?

by henri

• 13 years ago

1 answer

View Answer

3 of 3 questions shown

Fitment

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Customer Impersonation Script